Question: Three pumps are connected in parallel. According to pump performance curves, the shutoff head of each pump is as follows: Pump 1: 7 m Pump

Three pumps are connected in parallel. According to pump performance curves, the shutoff head of each pump is as follows:

Pump 1: 7 m Pump 2: 10 m Pump 3: 15 m

If the net head for this pump system is 9 m, which pump(s) should be shut off?

(a) Pump 1 

(b) Pump 2 

(c) Pump 3 

(d) Pumps 1 and 2

(e) Pumps 2 and 3

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